Traits linked to autism and attention deficit hyperactivity disorder tend to co-occur even in adulthood.

Raphael Bernier and James Mancini describe the similarities and differences between autism and attention deficit hyperactivity disorder.

Autism and attention deficit hyperactivity disorder often coincide, but the search for common biological roots has turned up conflicting evidence.

Differences in sleep and circadian rhythm may distort the results of autism studies.

Researchers have used light to manipulate neurons that dampen brain activity in rhesus macaques.

A cannabis gel may ease features of fragile X syndrome, omega fatty acids show promise for autism in two trials, and oxytocin reinforces social behaviors through the brain’s reward pathway.

A monkey study suggests facial recognition is not innate, a puzzle piece symbol carries negative connotations, and scientists are using a federal law to snoop on colleagues.

Some drugs used to treat epilepsy may harm children who are exposed to them in the womb or through breast milk.

Transcranial treatment may bolster memory in adults with autism, inflammatory molecule may alter an emotional brain region in newborns, and examining ants could yield insights into autism

Turning on a set of neurons that dampen brain activity improves social behavior in a mouse model of autism; turning off neurons that excite brain activity does the same thing.